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/*
*
* Copyright 2008 (c) Intel Corporation
* Jesse Barnes <jbarnes@virtuousgeek.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "display/intel_de.h"
#include "display/intel_fbc.h"
#include "display/intel_gmbus.h"
#include "display/intel_vga.h"
#include "i915_drv.h"
#include "i915_reg.h"
#include "i915_suspend.h"
static void intel_save_swf(struct drm_i915_private *dev_priv)
{
int i;
/* Scratch space */
if (IS_GEN(dev_priv, 2) && IS_MOBILE(dev_priv)) {
for (i = 0; i < 7; i++) {
dev_priv->regfile.saveSWF0[i] = intel_de_read(dev_priv, SWF0(i));
dev_priv->regfile.saveSWF1[i] = intel_de_read(dev_priv, SWF1(i));
}
for (i = 0; i < 3; i++)
dev_priv->regfile.saveSWF3[i] = intel_de_read(dev_priv, SWF3(i));
} else if (IS_GEN(dev_priv, 2)) {
for (i = 0; i < 7; i++)
dev_priv->regfile.saveSWF1[i] = intel_de_read(dev_priv, SWF1(i));
} else if (HAS_GMCH(dev_priv)) {
for (i = 0; i < 16; i++) {
dev_priv->regfile.saveSWF0[i] = intel_de_read(dev_priv, SWF0(i));
dev_priv->regfile.saveSWF1[i] = intel_de_read(dev_priv, SWF1(i));
}
for (i = 0; i < 3; i++)
dev_priv->regfile.saveSWF3[i] = intel_de_read(dev_priv, SWF3(i));
}
}
static void intel_restore_swf(struct drm_i915_private *dev_priv)
{
int i;
/* Scratch space */
if (IS_GEN(dev_priv, 2) && IS_MOBILE(dev_priv)) {
for (i = 0; i < 7; i++) {
intel_de_write(dev_priv, SWF0(i), dev_priv->regfile.saveSWF0[i]);
intel_de_write(dev_priv, SWF1(i), dev_priv->regfile.saveSWF1[i]);
}
for (i = 0; i < 3; i++)
intel_de_write(dev_priv, SWF3(i), dev_priv->regfile.saveSWF3[i]);
} else if (IS_GEN(dev_priv, 2)) {
for (i = 0; i < 7; i++)
intel_de_write(dev_priv, SWF1(i), dev_priv->regfile.saveSWF1[i]);
} else if (HAS_GMCH(dev_priv)) {
for (i = 0; i < 16; i++) {
intel_de_write(dev_priv, SWF0(i), dev_priv->regfile.saveSWF0[i]);
intel_de_write(dev_priv, SWF1(i), dev_priv->regfile.saveSWF1[i]);
}
for (i = 0; i < 3; i++)
intel_de_write(dev_priv, SWF3(i), dev_priv->regfile.saveSWF3[i]);
}
}
void i915_save_display(struct drm_i915_private *dev_priv)
{
struct pci_dev *pdev = dev_priv->drm.pdev;
/* Display arbitration control */
if (INTEL_GEN(dev_priv) <= 4)
dev_priv->regfile.saveDSPARB = intel_de_read(dev_priv, DSPARB);
if (IS_GEN(dev_priv, 4))
pci_read_config_word(pdev, GCDGMBUS,
&dev_priv->regfile.saveGCDGMBUS);
intel_save_swf(dev_priv);
}
void i915_restore_display(struct drm_i915_private *dev_priv)
{
struct pci_dev *pdev = dev_priv->drm.pdev;
intel_restore_swf(dev_priv);
if (IS_GEN(dev_priv, 4))
pci_write_config_word(pdev, GCDGMBUS,
dev_priv->regfile.saveGCDGMBUS);
/* Display arbitration */
if (INTEL_GEN(dev_priv) <= 4)
intel_de_write(dev_priv, DSPARB, dev_priv->regfile.saveDSPARB);
/* only restore FBC info on the platform that supports FBC*/
intel_fbc_global_disable(dev_priv);
intel_vga_redisable(dev_priv);
intel_gmbus_reset(dev_priv);
}
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